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A116988 Sum of digits of (10^n)!. 2
1, 27, 648, 10539, 149346, 1938780, 23903442, 284222502, 3292100235, 37420852599 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
COMMENTS
Cf. A004152 Sum of digits of factorial numbers, A113364 1,27,648,16245,... with first three terms coinciding with this SEQ.
LINKS
EXAMPLE
a(1)=27 because 10!=3628800 and 3+6+2+8+8+0+0=27.
MATHEMATICA
Do[Print[Total[IntegerDigits[(10^n)! ]]], {n, 0, 7}]
PROG
(Python)
from math import factorial
def A116988(n):
return sum(int(d) for d in str(factorial(10**n))) # Chai Wah Wu, May 21 2018
CROSSREFS
Sequence in context: A046359 A223500 A060603 * A113364 A095898 A014914
KEYWORD
hard,more,nonn,base
AUTHOR
Zak Seidov, Apr 02 2006
EXTENSIONS
One more term from Ryan Propper, Jun 27 2007
a(9) from Chai Wah Wu, May 21 2018
STATUS
approved

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Last modified April 14 20:39 EDT 2024. Contains 371667 sequences. (Running on oeis4.)